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Live Vaccinia Virus-Coated Microneedle Array Patches for Smallpox Vaccination and Stockpiling

Authors
 In-Jeong Choi  ;  Hye-Ran Cha  ;  Su Jin Hwang  ;  Seung-Ki Baek  ;  Jae Myun Lee  ;  Seong-O Choi 
Citation
 PHARMACEUTICS, Vol.13(2) : 209, 2021-02 
Journal Title
 PHARMACEUTICS 
Issue Date
2021-02
Keywords
coating ; immune response ; microneedle ; smallpox ; stability ; vaccinia virus
Abstract
Although smallpox has been eradicated globally, the potential use of the smallpox virus in bioterrorism indicates the importance of stockpiling smallpox vaccines. Considering the advantages of microneedle-based vaccination over conventional needle injections, in this study, we examined the feasibility of microneedle-based smallpox vaccination as an alternative approach for stockpiling smallpox vaccines. We prepared polylactic acid (PLA) microneedle array patches by micromolding and loaded a second-generation smallpox vaccine on the microneedle tips via dip coating. We evaluated the effect of excipients and drying conditions on vaccine stability in vitro and examined immune responses in female BALB/c mice by measuring neutralizing antibodies and interferon (IFN)-γ-secreting cells. Approximately 40% of the virus titer was reduced during the vaccine-coating process, with or without excipients. At -20 °C, the smallpox vaccine coated on the microneedles was stable up to 6 months. Compared to natural evaporation, vacuum drying was more efficient in improving the smallpox vaccine stability. Microneedle-based vaccination of the mice elicited neutralizing antibodies beginning 3 weeks after immunization; the levels were maintained for 12 weeks. It significantly increased IFN-γ-secreting cells 12 weeks after priming, indicating the induction of cellular immune responses. The smallpox-vaccine-coated microneedles could serve as an alternative delivery system for vaccination and stockpiling.
Files in This Item:
T202100519.pdf Download
DOI
10.3390/pharmaceutics13020209
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Microbiology (미생물학교실) > 1. Journal Papers
Yonsei Authors
Lee, Jae Myun(이재면) ORCID logo https://orcid.org/0000-0002-5273-3113
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/182160
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